The phase relations at 1273 K and liquidus surface projection of the Fe–Mo–Zr system were investigated by means of electron probe micro-analyzer (EPMA), scanning electron microscopy coupled with energy dispersive spectroscopy (SEM-EDS) and X-ray diffraction (XRD) methods. The composition range of C14 Laves phase was determined at 1273 K. The maximum solubility of Mo in C15–Fe₂Zr, Mo in Fe₂₃Zr₆, Fe in C15–Mo₂Zr and Zr in μ phase is about 4.8, 0.6, 17.7 and 4.6 at.% at 1273 K, respectively. The isothermal section at 1273 K of the Fe–Mo–Zr system on the whole composition ranges was constructed using 30 annealed alloys. In the liquidus surface projection, the primary solidification phase regions of bcc(Fe), C15–Fe₂Zr, C14, μ, R, σ, bcc(Zr), C15–Mo₂Zr and bcc(Mo) were experimentally confirmed using 31 as-cast alloys. Based on the experimental data in literature and the present work, the Fe–Mo–Zr system was optimized using CALPHAD method, and a set of self-consistent reliable thermodynamic parameters was obtained.

通过电子探针显微分析仪 (EPMA)、扫描电子显微镜结合能量色散谱 (SEM-EDS) 和 X 射线衍射研究了 1273 K 的相关系和 Fe-Mo-Zr 系统的液相线表面投影(XRD) 方法。C14 Laves 相的组成范围确定在 1273 K。Mo 在 C15-Fe ₂ Zr 中的最大溶解度，Mo 在 Fe ₂₃ Zr _{6 中}，Fe 在 C15-Mo ₂ Zr 中和 Zr 在 μ 相中的最大溶解度约为 4.8、0.6、在 1273 K 时分别为 17.7 和 4.6 at.%。Fe-Mo-Zr 系统在 1273 K 处的等温截面在整个成分范围内使用 30 种退火合金构建。在液相线表面投影中，bcc(Fe)、C15-Fe ₂的主要凝固相区域Zr、C14、μ、R、σ、bcc(Zr)、C15–Mo ₂ Zr 和 bcc(Mo) 使用 31 种铸态合金进行了实验确认。基于文献中的实验数据和目前的工作，使用CALPHAD方法对Fe-Mo-Zr体系进行了优化，并获得了一组自洽的可靠热力学参数。